Sorry about that.
The new Gauntlet of Power I was talking about is Caged Sun:
When Caged Sun enters the battlefield, choose a color.
Creatures you control of the chosen color have +1/+1.
Whenever you tap a land for one or more mana of the chosen color, add one mana of the chosen color to your mana pool.
Then there's Phyrexian Canceler (my personal favorite thus far):
Whenever a source deals damage to Phyrexian Canceller, that source's controller sacrifices that many permanents.
And our new Planeswalker: Karn, the Released
+4: Target player exiles a card from his or her hand.
-3: Exile target permanent.
-14: Set aside all non-aura permanents exiled by Karn, then restart the game. Then put all cards set aside this way onto the battlefield under your control.
There's also a new cost. It's the Phyrexian symbol, and it can be payed with either a given mana color, or two life.
That's what I found most interesting out of the cards I've seen leaked.